Limited wireless spectrum in future networks is an
issue that millimeter-Wave (mmWave) frequencies can resolve.
Beamforming is a challenging operation for mmWave systems.
Both analogue and hybrid solutions have been proposed. Apart
from Orthogonal Multiple Access (OMA) systems, the NonOrthogonal
Multiple Access (NOMA) scheme has been recently
considered as an alternative and can outperform OMA in many
cases. Our contribution is the application of NOMA to a hybrid
precoder design in mmWave indoor scenarios with multiple
users. Introducing to our system appropriate user grouping
and scheduling schemes, we show that the NOMA outperforms,
in terms of spectral efficiency, OMA by providing a 17.1%
improvement for high SNR values. Finally, applying NOMA
with fair power allocation improves the rate of users with weak
channel conditions by around 1 bps/Hz for 푆푁푅 > 5푑퐵, without
degrading the overall spectral efficiency in the cell.
|Name||VTS : Vehicular Technology Conference : VTC : [proceedings]|
|Conference||85th IEEE Vehicular Technology Conference, VTC Spring 2017|
|Period||4/06/17 → 7/06/17|